/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/NiagaraParameterDefinitions.h
Get all parameter libraries under the editor and niagara packages, along with those that are in the same package as theUObjectthis viewmodel is editing.
[TArray](API\Runtime\Core\Containers\TArray)< [UNiagaraParameterDefinitions](API\Plugins\NiagaraEditor\UNiagaraParameterDefinitions) * > GetAvailableParameterDefinitions ( bool bSkipSubscribedParameterDefinitions ) const